d-rod ddddd do-do do-ol dodol dodon dodoo dodro dofor dollo dollu dolno dolon dolor dondo donon donor doodo doorn dorff dorno doron dorud doufu doull douro droff droll drood droof drool droon droul droun duddo dudon dudou dufur dullu dundo dunno dunod dunun durno duron ffold flodd flond flood floor florn floro floru floud flour fludd fluff fluo- fluon fluor flurn flurr fnord fodor follo folon fondo fondu foord ford- fordo forno forro forud forur fould found fourd fouro frodo frond frood frorn froud fu-fu fuddu fullf fullo fund- fundo fundu fuorn furo- furor furud fuudo l-ron loddo lodno lodro lofou lollo lolol londo loord loron lorun lound lourd louro luddu lulul lundu lurun ndour ndulu nduru nnooo no-do no-no nodof nofor nofou nofun noldo non-u nondo nonno noonu noord nordo noron norro norun nould nroff nu-nu nudol nudur nullo nunon nunun nuoro nurlu nurun oddur odolo odoul odour odudu odulf oduro offof offon offun ofnod ofold ofono oforn ofour ollon ollur olord olour ondol onoff onond onoon onorn onour ooooo ordon ordro orfor orful orlon ornon orodo orold orolu orono oruro oudon oullo oulon oulun ouoro ourno ourol rdllr ro-ro rodl rodon rodor rofor rolfo rollo rolon rondo ronno roodu roond roull round rudno ruffo rufo- rufol rullo rulon rundu runo- runof runon udol udoll ufofu ufund ullur ulno- ululu uluru undun undur unfun unfur unnun unnur unold unoor unorn unrol unrun unurn urour uuuuu